rocketMQ message filter

RocketMQ supports filtering based on user-defined attributes, and the filtering expression is similar to where in SQL, such as: a> 5 AND b ='abc'

consumerFilter.java

package com.woodie.rocketmq.filter;

import org.apache.rocketmq.client.consumer.DefaultMQPushConsumer;
import org.apache.rocketmq.client.consumer.MessageSelector;
import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyContext;
import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyStatus;
import org.apache.rocketmq.client.consumer.listener.MessageListenerConcurrently;
import org.apache.rocketmq.common.message.MessageExt;

import java.io.UnsupportedEncodingException;
import java.util.List;

public class consumerFilter {

    public static void main(String[] args) throws Exception {
        DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("woodie");
        consumer.setNamesrvAddr("192.168.142.128:9876");
        consumer.subscribe("my-topic-filter", MessageSelector.bySql("sex='F' AND age >= 18"));

        consumer.registerMessageListener(new MessageListenerConcurrently() {
            @Override
            public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> msgs, ConsumeConcurrentlyContext context) {
                try {
                    for (MessageExt msg: msgs) {
                        System.out.println("消息：" + new String (msg.getBody(), "UTF-8"));
                    }
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                }

                System.out.println("接收到的消息" + msgs);
                // 返回消息是否消费成功
                return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
            }
        });


        consumer.start();

    }

}

SyncProducer.java

package com.woodie.rocketmq.filter;

import org.apache.rocketmq.client.producer.DefaultMQProducer;
import org.apache.rocketmq.client.producer.SendResult;
import org.apache.rocketmq.common.message.Message;

public class SyncProducer {

    public static void main(String[] args) throws Exception {
        DefaultMQProducer producer = new DefaultMQProducer("woodie");
        // 测试nameserver的地址
        producer.setNamesrvAddr("192.168.142.128:9876");

        // 启动生产者
        producer.start();

        String msg = "测试message设置参数在消费端获取";
        // 生产者生产消息的时候设置tags，在这里可以通过设置不能的tags来获取对应的数据
        // tags 设置*表示 所有换消息， 使用 || 表示获取多个
        // Message message = new Message("my-topic", "add || update", msg.getBytes("UTF-8"));
        Message message = new Message("my-topic-filter", "add", msg.getBytes("UTF-8"));

        message.putUserProperty("sex", "F");
        message.putUserProperty("age", "20");

        SendResult sendResult = producer.send(message);
        System.out.println("消息id:" + sendResult.getMsgId());
        System.out.println("消息队列:" + sendResult.getMessageQueue());
        System.out.println("消息偏移量:" + sendResult.getQueueOffset());
        System.out.println(sendResult);
        producer.shutdown();
    }

}

The test is as follows